Which of the following equations has an infinite number of solutions?

3x + 5 = 2x - 1 + x
2x - 1 = x + 3
-x - 1 = -1 - x
x = 1/2

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).